01-31-2011 Confidence Intervals

01-31-2011 Confidence Intervals - 1/31/2011...

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1/31/2011 1 Lecture 4: January 31, 2011 Today: One sample hypothesis tests using z: Chapter 9, pages 340 355 Then, the p value approach to hypothesis testing, pages 355 358 Homework 3 opens at 8:00 p.m. tonight: Page 351: Problems 9.6 and 9.8 Page 358: Problem 9.14 and 9.16 These are strictly one sample hypothesis test problems using z. It closes Wednesday, February 2 at 6:00 p.m. Unlimited tries until it closes! Feedback! Non Connect Practice problems: Page 351: Problems 9.5, 9.7, and 9.9 Page 358: Problems 9.11, 9.15, and 9.17 Answers are in the back of the book. If you need help with these, see a TA during office hours. Worked Out Problems–On my web site Page 358: Problems 9.13 and 9.19–Three sheets per problem Hypothesis Steps; Visual (Drawing) of the Steps; p value approach Lecture 4: January 31, 2011 A Look Ahead: Readings and Problems for Next Class Student’s t distribution (and confidence intervals): Readings: Chapter 8, pages 310 318 Problems to come are on pages 317 318. Two Sample Hypothesis Tests: Readings: Chapter 10, pages 390 401 Put on your seat belt! Problems to come are on pages 400 401. I asked you to download a handout titled Steps in Hypothesis Testing . I have revised this handout and renamed it Revised Steps in Hypothesis Testing . Bring the revision with you to class on Wednesday. Pay particular attention to Step 5, which is very detailed regarding how to state the conclusion for a hypothesis test.

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1/31/2011 2 Bring To Next Class z table t table Both are in the Handouts section of my web site. PRS: I will ask you to calculate a p value. You will need to use the z table for this. PRS: I will ask you how to use the t table after I explain it for about a half hour. Summary Items from last class. We will carry these forward! The behavior of the sample mean is explained by a very important theorem: Central Limit Theorem Vocabulary: The probability distribution of a sample statistic has a special name: sampling distribution
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This note was uploaded on 10/13/2011 for the course FINOPMGT 250 taught by Professor Kouzehkanani during the Spring '08 term at UMass (Amherst).

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01-31-2011 Confidence Intervals - 1/31/2011...

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